Today, we are excited to announce the release of SignFabric, an open source, enterprise-ready e-signature platform built with ASP.NET Core and TX Text Control technologies. Designed for customization, integration, and full deployment ownership, SignFabric enables enterprises and software vendors to integrate document signing workflows directly into their own applications and infrastructure.

Test it live

Experience the SignFabric end-user interface and signing workflows by visiting the live demo environment. Explore the features and see how SignFabric can be integrated into your applications. If you want to test the admin interface, clone the repository and deploy it within your own infrastructure to access the full range of features and customization options.

https://esign.textcontrol.com/

Modern enterprises rarely want another isolated SaaS silo for document signing. They want signing capabilities embedded directly into their own applications, workflows, identity systems, and business processes. SignFabric was created for organizations that want full control over their signing infrastructure, as well as for developers who need to integrate enterprise-grade e-signature functionality into customer projects. Unlike many SaaS-first e-signature solutions with limited extensibility, SignFabric provides a flexible, fully customizable platform foundation that can be adapted, extended, and deployed within existing enterprise environments.

Built for Ownership and Enterprise Integration

The architecture was designed around one core principle: Enterprises should fully own and control their signing infrastructure. The platform includes the complete source code and can be deployed on-premises, in private cloud environments, or within existing enterprise hosting infrastructures.

Rather than forcing organizations into proprietary workflows or closed SaaS ecosystems, SignFabric provides an extensible foundation that can be deeply integrated into ERP systems, HR platforms, CRM solutions, approval workflows, and custom business applications. This allows organizations to build signing experiences around their existing processes instead of adapting processes to fit external platforms.

The modular architecture also reduces long-term vendor lock-in concerns. Developers can customize workflows, extend APIs, replace UI components, integrate custom authentication providers, and implement tenant-specific business rules while maintaining complete control over deployment and infrastructure decisions.

At its core, SignFabric is a complete ASP.NET Core Razor Pages application for preparing documents, managing signing workflows, sending signature requests, reviewing signed documents, and validating signatures. SignFabric uses TX Text Control components for document editing, signature field handling, PDF generation, and validation workflows. This creates a document-centric platform that feels deeply integrated rather than bolted together.

Architectural Philosophy: A Fabric, Not a Black Box

The name "SignFabric" reflects the architectural concept of the application. A fabric is a layer that connects and orchestrates systems into one cohesive platform. SignFabric is intended to be exactly that: A flexible foundation that weaves together document processing, workflows, authentication, signing infrastructure, and enterprise integrations into a unified solution.

"SignFabric was designed as a customizable integration layer that weaves document workflows, signing, and enterprise systems into one unified platform."

One of the most important goals during development was customization. Enterprises want a platform that integrates with existing ERP systems, HR workflows, CRMs, identity providers, and internal approval processes. The platform architecture was intentionally designed to support these enterprise integration scenarios. The modular architecture separates workflows, infrastructure services, APIs, and presentation logic, making enterprise customization and integration straightforward without hidden SaaS limitations.

Enterprise Architecture, Security, and Deployment Flexibility

From the beginning, the platform was built with enterprise deployment scenarios in mind. SignFabric includes support for OpenID Connect authentication, OAuth 2.0 protected APIs, Azure Key Vault certificate integration, encrypted certificate and SMTP credential storage, audit logging, reusable templates, collaborative review workflows, and role-based administration. The Bootstrap 5 based frontend was intentionally designed for customization and white-labeling scenarios, enabling organizations to adapt the user experience, branding, and workflows to their own enterprise requirements.

Another key aspect of SignFabric is long-term ownership and openness. The platform is released as open source license and includes the complete application source code. Licensed users of TX Text Control can use SignFabric as a production-ready foundation for proprietary signing solutions, customize workflows and interfaces, integrate internal systems, and deploy the platform within their own infrastructure and compliance boundaries. This makes SignFabric especially interesting for enterprises that require on-premises deployment, strict compliance control, or deep integration into existing business systems. Deployment flexibility ranges from internal on-premises installations to private cloud and hybrid enterprise environments.

Functionality Overview

SignFabric provides a comprehensive set of features for preparing documents, managing signing workflows and signatures, and managing users. Once onboarded, an admin can invite and manage users, configure the SMTP settings for sending signature requests, upload and manage certificates for signing, and create API tokens for integration.

Certificate Management

Administrators can upload, manage, and rotate signing certificates directly within the integrated certificate management system. The application supports PFX certificates and can integrate with Azure Key Vault for secure certificate storage.

Authentication and API Security

The platform integrates with external identity providers through OpenID Connect authentication and enterprise SSO configurations. The application includes an API token management system based on OAuth that allows administrators to create and manage tokens for secure API access.

Document Preparation and Signing Workflows

Users can upload documents, add signature fields to prepare them for signing, and send signature requests to recipients. The process is simple: select a document, add signature fields, specify recipients, and send the document for signing. The intuitive and user-friendly signing interface features clear instructions and a modern design.

Once all the recipients have been defined and the document does not contain signature fields, it can be opened to add signature fields for each recipient. Additionally, personalized form fields can be added for each recipient, providing a customized signing experience.

Signing Experience and Document Management

After the document is sent, recipients receive an email with a link to sign the document. The signing interface is designed to be intuitive and user-friendly, with clear instructions and a modern design.

Admins can customize the email templates used for signature requests, allowing them to create personalized and branded communications with recipients. This feature enhances the user experience and reinforces brand identity during the signing process.

The TX Text Control Document Viewer is used for signing, providing a consistent and integrated experience. The viewer supports a wide range of document formats, including DOCX, RTF, and more, ensuring that users can work with their preferred file types seamlessly.

Senders can track the status of signature requests, view signed documents, and download completed files. The application provides a clear overview of all signing activities, making it easy for users to manage their documents and workflows.

All signed documents are stored securely within the application, and users can access them at any time. The platform also includes audit logging features that track all signing activities, providing a comprehensive record for compliance and security purposes.

Contracts and Template Management

Collaborative contract workflows enable users to manage redlining, reviews, approvals, and signing preparation within a centralized environment. This feature is particularly useful for complex agreements that require collaboration and multiple rounds of edits. Users can upload documents, share them with collaborators, and manage the redlining process within the application.

When a contract is finalized, it can be sent for signing directly from the contract management interface. This streamlined workflow eliminates the need for manual document handling and ensures that all contract-related activities are centralized within SignFabric.

Templates can be created for frequently used document types, allowing users to quickly prepare and send documents without starting from scratch each time. This feature saves time and ensures consistency across documents.

Document Validation

Built-in document validation capabilities verify document integrity, template consistency, and signature authenticity after signing. This ensures that the signed documents have not been tampered with and that all signatures are valid. The validation process checks the integrity of the document, verifies signatures, and provides a detailed report of the validation results.

After uploading a signed document, users can run the validation process to ensure that the document is authentic and that all signatures are valid. The validation results are displayed in a clear and detailed report, providing users with confidence in the integrity of their signed documents.

API and Integration Capabilities

SignFabric includes a versioned REST API that allows organizations to integrate signing workflows directly into existing business applications, portals, workflow engines, and document automation systems. With OAuth 2.0 based authentication and enterprise integration support, SignFabric can serve as a centralized signing infrastructure layer across distributed business systems.

Getting Started with SignFabric

SignFabric is available on GitHub. Licensed users of TX Text Control can clone the repository, customize the source code, and deploy the application within their own infrastructure. The repository includes detailed documentation on installation, configuration, and customization, making it easy for developers to get started.

Learn more

Explore the SignFabric repository on GitHub to learn more about the application, its features, and how to get started with your own deployment.

https://github.com/TextControl/SignFabric

SignFabric represents a different approach to enterprise e-signature solutions: Open, customizable, integration-first, and fully owned by the customer. Instead of delivering another isolated signing product, SignFabric provides a modern platform foundation that enterprises and software vendors can adapt to their own infrastructure, workflows, compliance requirements, and customer experiences.

We will publish follow-up articles with technical deep dives into the architecture, deployment strategies, customization capabilities, and integration scenarios. In the meantime, we encourage developers and enterprise architects to explore the repository, deploy the platform, and build their own integrated signing experiences on top of SignFabric.

Frequently Asked Questions